Crossword Clue:

a current of air downwards

AnswerCrossword Clue
SLIPSTREAMAir current caused by a propeller
SLIPSTREAMAir current caused by a racecar
DRAFTCurrent of air
DRAFTCurrent of air.
EDDYCurrent of air.
CROSSWINDStrong current of air
THERMALRising current of warm air